Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2018 2 13.  Predictions up to the next  14.0 days:

     Date     Time(NPP) NPP Lat/Lon Date Time(TERRA) TERRA Lat/Lon    Distance(km)  Time Diff(sec)
 02/14/2018   19:12:47   ( -68.35,  70.40) 02/14/2018   19:13:27  ( -68.34,  70.45)    1.93                40
 02/14/2018   20:03:31   (  68.21,-122.11) 02/14/2018   20:02:54  (  68.23,-122.05)    3.31                37
 02/17/2018   10:39:09   (  69.00,  17.99) 02/17/2018   10:40:18  (  68.90,  19.39)   56.74                69
 02/17/2018   11:29:39   ( -68.29,-173.74) 02/17/2018   11:29:57  ( -68.30,-173.72)    1.83                18
 02/17/2018   12:20:23   (  68.15,  -6.26) 02/17/2018   12:19:25  (  68.13,  -6.28)    2.82                58
 02/20/2018   02:55:50   (  68.35, 134.63) 02/20/2018   02:56:57  (  68.36, 134.60)    1.76                67
 02/20/2018   03:46:32   ( -68.28, -57.95) 02/20/2018   03:46:27  ( -68.27, -57.89)    3.21                 5
 02/20/2018   04:37:10   (  67.82, 109.93) 02/20/2018   04:35:58  (  67.92, 109.35)   26.46                72
 02/22/2018   19:12:43   (  68.35,-109.59) 02/22/2018   19:13:27  (  68.33,-109.57)    2.93                44
 02/22/2018   20:03:24   ( -68.22,  57.90) 02/22/2018   20:02:57  ( -68.24,  57.95)    2.56                27
 02/25/2018   10:39:07   ( -69.33,-162.44) 02/25/2018   10:40:14  ( -69.26,-160.17)   89.63                67
 02/25/2018   11:29:34   (  68.30,   6.26) 02/25/2018   11:29:56  (  68.30,   6.27)    0.57                22
 02/25/2018   12:20:15   ( -68.17, 173.75) 02/25/2018   12:19:27  ( -68.15, 173.73)    1.93                48